SNMP driver

SNMP driver

The SNMP hardware type enables control of power distribution units of the type frequently found in data centre racks. PDUs frequently have a management ethernet interface and SNMP support enabling control of the power outlets.

The SNMP power interface works with the PXE boot interface for network deployment and network-configured boot.

Note

Unlike most of the other power interfaces, the SNMP power interface does not have a corresponding management interface. The SNMP hardware type uses the fake management interface instead.

List of supported devices

This is a non-exhaustive list of supported devices. Any device not listed in this table could possibly work using a similar driver.

Please report any device status.

Manufacturer Model Supported? Driver name
APC AP7920 Yes apc_masterswitch
APC AP9606 Yes apc_masterswitch
APC AP9225 Yes apc_masterswitchplus
APC AP7155 Yes apc_rackpdu
APC AP7900 Yes apc_rackpdu
APC AP7901 Yes apc_rackpdu
APC AP7902 Yes apc_rackpdu
APC AP7911a Yes apc_rackpdu
APC AP7921 Yes apc_rackpdu
APC AP7922 Yes apc_rackpdu
APC AP7930 Yes apc_rackpdu
APC AP7931 Yes apc_rackpdu
APC AP7932 Yes apc_rackpdu
APC AP7940 Yes apc_rackpdu
APC AP7941 Yes apc_rackpdu
APC AP7951 Yes apc_rackpdu
APC AP7960 Yes apc_rackpdu
APC AP7990 Yes apc_rackpdu
APC AP7998 Yes apc_rackpdu
APC AP8941 Yes apc_rackpdu
APC AP8953 Yes apc_rackpdu
APC AP8959 Yes apc_rackpdu
APC AP8961 Yes apc_rackpdu
APC AP8965 Yes apc_rackpdu
Aten all? Yes aten
CyberPower all? Untested cyberpower
EatonPower all? Untested eatonpower
Teltronix all? Yes teltronix
BayTech MRP27 Yes baytech_mrp27

Software Requirements

  • The PySNMP package must be installed, variously referred to as pysnmp or python-pysnmp

Enabling the SNMP Hardware Type

  1. Add snmp to the list of enabled_hardware_types in ironic.conf. Also update enabled_management_interfaces and enabled_power_interfaces in ironic.conf as shown below:

    [DEFAULT]
    enabled_hardware_types = snmp
    enabled_management_interfaces = fake
    enabled_power_interfaces = snmp
    
  2. To set the default boot option, update default_boot_option in ironic.conf:

    [DEFAULT]
    default_boot_option = netboot
    

    Note

    Currently the default value of default_boot_option is netboot but it will be changed to local in the future. It is recommended to set an explicit value for this option.

    Note

    It is important to set boot_option to netboot as SNMP hardware type does not support setting of boot devices. One can also configure a node to boot using netboot by setting its capabilities and updating Nova flavor as described below:

    openstack baremetal node set --property capabilities="boot_option:netboot" <node-uuid>
    openstack flavor set --property "capabilities:boot_option"="netboot" ironic-flavor
    
  3. Restart the Ironic conductor service.

    service ironic-conductor restart
    

Ironic Node Configuration

Nodes configured to use the SNMP hardware type should have the driver field set to the hardware type snmp.

The following property values have to be added to the node’s driver_info field:

  • snmp_driver: PDU manufacturer driver name or auto to automatically choose ironic snmp driver based on SNMPv2-MIB::sysObjectID value as reported by PDU.
  • snmp_address: the IPv4 address of the PDU controlling this node.
  • snmp_port: (optional) A non-standard UDP port to use for SNMP operations. If not specified, the default port (161) is used.
  • snmp_outlet: The power outlet on the PDU (1-based indexing).
  • snmp_version: (optional) SNMP protocol version (permitted values 1, 2c or 3). If not specified, SNMPv1 is chosen.
  • snmp_community: (Required for SNMPv1/SNMPv2c unless snmp_community_read and/or snmp_community_write properties are present in which case the latter take over) SNMP community name parameter for reads and writes to the PDU.
  • snmp_community_read: SNMP community name parameter for reads to the PDU. Takes precedence over the snmp_community property.
  • snmp_community_write: SNMP community name parameter for writes to the PDU. Takes precedence over the snmp_community property.
  • snmp_user: (Required for SNMPv3) SNMPv3 User-based Security Model (USM) user name. Synonym for now obsolete snmp_security parameter.
  • snmp_auth_protocol: SNMPv3 message authentication protocol ID. Valid values include: none, md5, sha for all pysnmp versions and additionally sha224, sha256, sha384, sha512 for pysnmp versions 4.4.1 and later. Default is none unless snmp_auth_key is provided. In the latter case md5 is the default.
  • snmp_auth_key: SNMPv3 message authentication key. Must be 8+ characters long. Required when message authentication is used.
  • snmp_priv_protocol: SNMPv3 message privacy (encryption) protocol ID. Valid values include: none, des, 3des, aes, aes192, aes256 for all pysnmp version and additionally aes192blmt, aes256blmt for pysnmp versions 4.4.3+. Note that message privacy requires using message authentication. Default is none unless snmp_priv_key is provided. In the latter case des is the default.
  • snmp_priv_key: SNMPv3 message privacy (encryption) key. Must be 8+ characters long. Required when message encryption is used.
  • snmp_context_engine_id: SNMPv3 context engine ID. Default is the value of authoritative engine ID.
  • snmp_context_name: SNMPv3 context name. Default is an empty string.

The following command can be used to enroll a node with the snmp hardware type:

openstack baremetal node create --os-baremetal-api-version=1.31 \
  --driver snmp --driver-info snmp_driver=<pdu_manufacturer> \
  --driver-info snmp_address=<ip_address> \
  --driver-info snmp_outlet=<outlet_index> \
  --driver-info snmp_community=<community_string> \
  --properties capabilities=boot_option:netboot
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